A part
宙
Shown as a part of 1 word so far, read one way.
ちゅう 1 word
- 宙返りちゅうがえりsomersault, looping-the-loop
宙返り · here “mid-air”
Also written with 宙
These words contain the character in their spelling but show no breakdown that names it, so nothing is claimed about its role in them.